A Simple and Efficient Palladium Catalyst of Nitrogen-Based Ligand for Cu(I)- and Amine-Free Sonogashira Reaction
摘要:
Glycine, as a kind of commercially available and inexpensive ligand, is used to prepare an air-stable and water-soluble catalyst used in Sonogashira reaction in our study. In the presence of 1% [PdCl2(NH2CH2COOH)(2)] as catalyst, excellent catalytic activity towards the Sonogashira coupling of aryl iodides with terminal alkynes without using any additive such as Cu(I)-cocatalyst is observed in a mixture of water and acetone (3/3mL) under air at 60 degrees C with NaOH as a base, giving products in good to excellent yields.
study on room temperature Suzuki cross-coupling in an aqueous medium was carried out using a simple hydrophilic palladium (II) complex, trans-PdCl2(NH2CH2COOH)2 as catalyst in the presence of K2CO3 in air. This approach with a comparatively inexpensive and hydrophilic catalyst, mild reaction condition and aqueousmedia exhibits excellent catalytic activity towards the Suzuki coupling of aryl bromides
Preparation of aromatic γ-hydroxyketones by means of Heck coupling of aryl halides and 2,3-dihydrofuran, catalyzed by a palladium(<scp>ii</scp>) glycine complex under microwave irradiation
作者:Juan C. Jiménez-Cruz、Ramón Guzmán-Mejía、Eusebio Juaristi、Omar Sánchez-Antonio、Marco A. García-Revilla、J. Betzabe González-Campos、Judit Aviña-Verduzco
DOI:10.1039/d0nj02630a
日期:——
A series of aromatic γ-hydroxyketones were prepared by means of Heck coupling reaction of aryl halides and 2,3-dihydrofuran, catalyzed by PdCl2·Gly2 and under microwave irradiation. This synthetic transformation involves the formation of an aryl-dihydrofuranoic intermediate, followed by an unusual opening of the heterocycle promoted by a water molecule and the formation of the ketone carbonyl function
作者:Steiner, Norbert、Ehrensdorfer, Eva、Chen, Jingtang、Beck, Wolfgang
DOI:——
日期:——
Catalytic activity of electrolytic palladium deposits on porous nickel substrates
作者:T. G. Nikiforova、T. V. Savel’eva、O. A. Datskevich
DOI:10.1134/s107042721108009x
日期:2011.8
Catalytic activity of palladium layers in reduction of atmospheric oxygen and oxidation of methanol and ethanol in an alkaline medium was studied for electrolytic palladium deposits on porous nickel substrates by cyclic voltammetry on a rotating disk electrode.